int netbios_session_connect(struct in_addr *addr,
netbios_session *s,
const char *name,
int direct_tcp)
{
ssize_t recv_size;
char *encoded_name = NULL;
assert(s != NULL && s->packet != NULL);
if (direct_tcp)
s->remote_addr.sin_port = htons(NETBIOS_PORT_DIRECT);
else
s->remote_addr.sin_port = htons(NETBIOS_PORT_SESSION);
s->remote_addr.sin_family = AF_INET;
s->remote_addr.sin_addr.s_addr = addr->s_addr;
if (!open_socket_and_connect(s))
goto error;
if (!direct_tcp)
{
// Send the Session Request message
netbios_session_packet_init(s);
s->packet->opcode = NETBIOS_OP_SESSION_REQ;
encoded_name = netbios_name_encode(name, 0, NETBIOS_FILESERVER);
if (!netbios_session_packet_append(s, encoded_name, strlen(encoded_name) + 1))
goto error;
free(encoded_name);
encoded_name = netbios_name_encode("LIBDSM", 0, NETBIOS_WORKSTATION);
if (!netbios_session_packet_append(s, encoded_name, strlen(encoded_name) + 1))
goto error;
free(encoded_name);
encoded_name = NULL;
s->state = NETBIOS_SESSION_CONNECTING;
if (!netbios_session_packet_send(s))
goto error;
// Now receiving the reply from the server.
recv_size = netbios_session_packet_recv(s, NULL);
if (recv_size < 0)
goto error;
// Reply was negative, we are not connected :(
if (s->packet->opcode != NETBIOS_OP_SESSION_REQ_OK)
{
s->state = NETBIOS_SESSION_REFUSED;
return 0;
}
}
// Reply was OK or DirectTCP, a session has been established
s->state = NETBIOS_SESSION_CONNECTED;
return 1;
error:
free(encoded_name);
s->state = NETBIOS_SESSION_ERROR;
return 0;
}
int netbios_session_connect(uint32_t ip, netbios_session *s,
const char *name, int direct_tcp)
{
ssize_t recv_size;
char *encoded_name = NULL;
uint16_t ports[2];
unsigned int nb_ports;
bool opened = false;
assert(s != NULL && s->packet != NULL);
if(s != NULL && s->packet != NULL){
if (direct_tcp)
{
ports[0] = htons(NETBIOS_PORT_DIRECT);
ports[1] = htons(NETBIOS_PORT_DIRECT_SECONDARY);
nb_ports = 2;
}
else
{
ports[0] = htons(NETBIOS_PORT_SESSION);
nb_ports = 1;
}
for (unsigned int i = 0; i < nb_ports && !opened; ++i)
{
s->remote_addr.sin_port = ports[i];
s->remote_addr.sin_family = AF_INET;
s->remote_addr.sin_addr.s_addr = ip;
opened = open_socket_and_connect(s) == DSM_SUCCESS;
}
if (!opened)
goto error;
if (!direct_tcp)
{
// Send the Session Request message
netbios_session_packet_init(s);
s->packet->opcode = NETBIOS_OP_SESSION_REQ;
encoded_name = netbios_name_encode(name, 0, NETBIOS_FILESERVER);
if (!netbios_session_packet_append(s, encoded_name, strlen(encoded_name) + 1))
goto error;
free(encoded_name);
encoded_name = netbios_name_encode("LIBDSM", 0, NETBIOS_WORKSTATION);
if (!netbios_session_packet_append(s, encoded_name, strlen(encoded_name) + 1))
goto error;
free(encoded_name);
encoded_name = NULL;
s->state = NETBIOS_SESSION_CONNECTING;
if (!netbios_session_packet_send(s))
goto error;
// Now receiving the reply from the server.
recv_size = netbios_session_packet_recv(s, NULL);
if (recv_size < 0)
goto error;
// Reply was negative, we are not connected :(
if (s->packet->opcode != NETBIOS_OP_SESSION_REQ_OK)
{
s->state = NETBIOS_SESSION_REFUSED;
return 0;
}
}
// Reply was OK or DirectTCP, a session has been established
s->state = NETBIOS_SESSION_CONNECTED;
return 1;
error:
free(encoded_name);
s->state = NETBIOS_SESSION_ERROR;
return 0;
}
return 0;
}